Bug 2032652 - Adds ability to insert a tree of bookmarks at a time with [ci full]

[boek]

insertBookmarkTree.

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[segunfamisa]

@boek let's run a try. i think there are some lint issues with this one.

[segunfamisa]

oh lol. what!? i think i need my morning coffee (again).

i did not realise this was in application-services project.

Either way, we should fix the lint issue the CI found.

[boek]

Will work on that today

The pull request has been modified, dismissing previous reviews.